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2 Sheets-Sheet ll.

F. GOULD.

SPEAKING TUBE ATTACHMENT.

(Model.)

MMM W, @E E m uw C (Model.) 2 sheets-snm 2. F. GOULD.

SPEAKING TUBE ATTAGHMBNT. No'. 272,541. z/ Patented Feb.20, 1883.

Dz we n 'fax' MM I /w UNITED STATES PATENT OFFICE.

FAYETTE GOULD, OF NEW YORK, N. Y.

sPEAKiNGr-TUBE ATTACH MENT.

SPECIFICATION forming part of Letters Patent No. 272,541, dated February 20, 15333. .Application tiled November 15, 1882. (Model.)

To all whom it may concern Beit known that I, FAYETTE GoULD,ofNew York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Speaking-Tubes; and l do hereby declare the following to be a full, clear, and exact description ot' the invention, Stich as will enable others skilled in the art t0 which it pertains to make and use it, reference being` had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in speaking-tubes; and it consists, iirst, in a eentral chamber iu which any desired number of tubes center, and which chamber is provided with a whistle which is common to all ot' the speaking-tubes connected with the chamber; sec0i1d,a central receiving-chamber having openings throughits sides, so as to communicate with all the tubes which center in this chamber, in combination with a revolving mouthpiece having` a bent tube attached thereto, and which can be turned so as to communicate with any one of the tubes; third, in the arrangement and combination oi' parts, which will be more fully described hereinafter.

Figure l is a vertical section taken through the receiving-chamber. Fig. 2 is an inverted view of the top of the chamber. Fig. 3 is a view of the chamber with the cover removed. Fig. 4 is .a front view of my invention complete.

Arepresents thereceiving-ohamber, in which the ends of all the speaking-tubes ii center. This chamberis here shown as being` niadeoi' an annular shape, though I do not confine myself to this 0r any other form, for one shape will answer as Well as another. In the center of this chamber is made the circular recess C, into which the inner end of the mouth-piece L extends, so as to make connection with the bent tube or pipe M', which is secured to the inner end of the mouth-piece, so as to turn with it, and which pipe M serves to connect the mouthpiece with any one of the speaking-tubes B. Each one of thev speaking-tubes has a side passage, F, leading from it to the central recess, U, so as to make connection with the pipe M' and the mouth-piece. In the end E of each speaking-tube is placed a suitable valve, G, which is connected to a button, H, placed upon the outside of the front ot' the case. When l a person blows in one of the speakiiig-tubes the air forces the valve G away from its seat D, formed in the speaking-tube, and then the air escapes around the valve into the chamber A, that surrounds the mouth-piece L, and esA capes through the whistle I, which is common to all of the tubes. The air from any one or all of the tubes, as above described, passes freely into the outer chamber, A, and in escaping through the whistle I sounds the alarm. By thus having; the ends oil all of the tubes center iu one chamber and providing` a single whistle through the cover of the chamber a separate whistle for each tube is done away with, and the cost of the tubes decreased accordingly.

The revolving1 mouth-piece L,which is placed in the center ot' the cover ot' the case or traine, has attached to its inner end the hollow cylinder M, which ts inside ot' the circular recess G, for the purpose of cutting` oi communication with all the tubes but one, and serves to center the short bent tube M, connected with the mouthpiece,in position. Fastened to this mouth-piece, which is held loosely in the cover ofthe case, so thatitean beturned freely around, is the pointer O.

Vhen a signal is given through one of the tubes the button H that was blown outward is first forced inward, and then the mouthpiece is turned until this pointer catches over this button, when the inner end ot' the bent tube M,connected with the mouth-piece,reg isters with the passage F ofthe tube through which the signal was made. The valve G being` closed in this tube, all that is spoken from either end ofthe tube can bedistinetly heard, for the sound is contned to this tube alone.

By having a cylinder or lnnge M tit snugly in the recess C, as here shown, communication can be made with only one tube at a time, for all ot' the passages F, with the exception et' the one with which the bent pipe M registers, are closed.

Having thus described my invention, I claiml. The combination of a number el speakingtubes, a chamber which is common to all ot' the tubes, a whistle communicating with said chamber, and a valve for each tube capable of closing the entrance to said chamber, substantially as shown.

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2. The combination of the frame having ai chamber in ifs outer end, aseries of speakingtubes,a1lof which communicate with thisehain ber, a valve for each tube, and' a revolving;` mouth-piece which may be brought into oommunioatiion with any one of the tubes, substantially as described,

3. The combination of aseries of speakingtubes, each one of which has :i short pipe for connection with the mouth-piece, a. suitable reeeiving-ehainbe'9 a Valve for each tube, and a revolving mouth-piece capable of connection with either tube, substantially as set; forth.

4. The combination of a series of speakingtubes, a chamber that is common to all of the tubes, a valve for e'fieh tube, a central receiving-chamber, and :L revolving,r mouth-piece provided with a pointer, sulwtnntiailiy as specified.

In testimony whereof' I affix my signature in presence of two Witnesses.

FAYETTE GUULD.

Witnesses:

CHARLES R. STREET, HENRY C. PLATT. 

